msg 1.12.11devel
Loading...
Searching...
No Matches
msg_mclass_hash.h
Go to the documentation of this file.
1/*
2 * This file is part of the Sofia-SIP package
3 *
4 * Copyright (C) 2005 Nokia Corporation.
5 *
6 * Contact: Pekka Pessi <pekka.pessi@nokia-email.address.hidden>
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public License
10 * as published by the Free Software Foundation; either version 2.1 of
11 * the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
21 * 02110-1301 USA
22 *
23 */
24
25#ifndef MSG_MCLASS_HASH_H
27#define MSG_MCLASS_HASH_H
28
40#include <sofia-sip/su_config.h>
41
42#ifndef BNF_H
43#include <sofia-sip/bnf.h>
44#endif
45
46SOFIA_BEGIN_DECLS
47
49#define MC_HASH(s, n) (msg_header_name_hash(s, NULL) % (unsigned)(n))
50
53unsigned short msg_header_name_hash(char const *s, isize_t *llen)
54{
55 unsigned short hash = 0;
56 size_t i;
57
58 for (i = 0; s[i]; i++) {
59 unsigned char c = s[i];
60 if (!(_bnf_table[c] & bnf_token))
61 break;
62 if (c >= 'A' && c <= 'Z')
63 hash += (c + 'a' - 'A');
64 else
65 hash += c;
66 hash *= 38501U;
67 }
68
69 if (llen)
70 *llen = i;
71
72 return hash;
73}
74
75SOFIA_END_DECLS
76
77#endif
unsigned short msg_header_name_hash(char const *s, isize_t *llen)
Hash header name.
Definition msg_mclass_hash.h:53
#define su_inline

Sofia-SIP 1.12.11devel - Copyright (C) 2006 Nokia Corporation. All rights reserved. Licensed under the terms of the GNU Lesser General Public License.